Search results for: Fengyun Li

Items from 1 to 20 out of 25 results

article

Capital gain overhang and risk–return trade‐off: An international study

Dazhi Zheng, Huimin Li, Fengyun Li

Journal of Financial Research > 47 > 1 > 211 - 242

In this article, we examine the risk–return relation under the impact of investors' price reference points in international markets. We calculate capital gain overhang (CGO) to measure the psychological evaluation of past returns. Using a double‐sorting methodology, we find that a negative risk–return trade‐off generally exists in international markets when CGO is low; results using the Fama–MacBeth...

article

DNA Hydrogels and Microgels for Biosensing and Biomedical Applications

Fengyun Li, Danya Lyu, Shuo Liu, Weiwei Guo

Advanced Materials > 32 > 3 > n/a - n/a

DNA hydrogels, which take advantage of the unique properties of functional DNA motifs, such as specific molecular recognition, programmable and high‐precision assembly, multifunctionality, and excellent biocompatibility, have attracted increasing research interest in the past two decades in diverse fields, especially in biosensing and biomedical applications. The responsiveness of smart DNA hydrogels...

article

Experimental Study on Dynamic Water Grouting of Modified Water-Soluble Polyurethane

Xiaofan Liu, Junguang Wang, Kun Huang, Fengyun Li

KSCE Journal of Civil Engineering > 2019 > 23 > 9 > 3897-3906

In underground project, water inrush disaster often occurs, resulting in a large number of casualties and economic losses. To solve these problems, grouting is one of the main techniques for controlling water inrush. At present, the research results on the treatment of water inrush by grouting are based on anhydrous or hydrostatic grouting. However, the study of dynamic water grouting is relatively...

article

Mobile phone mediated point-of-care testing of HIV p24 antigen through plastic micro-pit array chips

Fengyun Li, Hongli Li, Zhaoyan Wang, Jing Wu, more

Sensors and Actuators B: Chemical > 2018 > 271 > C > 189-194

Plastic micro-chips with micro-pit array (μPACs) were used for the mobile phone mediated detection of HIV capsid p24 antigen. The μPACs with a size comparable to common test strips were fabricated on transparent cyclic olefin copolymer (COC) sheets to ensure the optical detection and solvent compatibility. An antibody (for p24 antigen) was covalently immobilized onto the inner surface of micro-pits...

article

Multifunctional Poly‐N‐Isopropylacrylamide/DNAzyme Microgels as Highly Efficient and Recyclable Catalysts for Biosensing

Fengyun Li, Chunyan Wang, Weiwei Guo

Advanced Functional Materials > 28 > 10 > n/a - n/a

The development of highly efficient, recyclable, and multifunctional biocatalysts is of great importance for various applications, especially in biosensing. In this study, highly catalytic and recyclable DNAzyme functionalized poly‐N‐isopropylacrylamide (pNIPAM) microgels are prepared via one‐step precipitation polymerization. The pNIPAM/DNAzyme microgels exhibit highly catalytic activities in aqueous...

chapter

Analysis on Tort Liability of Internet Service Providers

Xiaomei Hong, Fengyun Li

Communications in Computer and Information Science > Advances in Computer Science and Education Applications > 475-480

At present, there is not a united, special law of Internet Service Providers, and there are many shortages in existing law of Internet Service Providers. For example, lacking of the subject system of Internet Service Providers; not forming the internet law system; lowering the legal grade, and so on. As the important status of Internet Service Providers in information spread, whether the rights and...

chapter

Space Disturbing Based Uncertainty Trajectory Anonymous Algorithm in Trajectory Databases Publication

Fengyun Li, Peng Li, Jinhua Yang

2016 13th Web Information Systems and Applications Conference (WISA) > 209 - 214

2016 13th Web Information Systems and Applications Conference (WISA)

In recent years, privacy preserving trajectory data publishing has gained widespread attention. Aiming at the trajectory anonymity issues in publishing trajectory data of moving target, using the inherent uncertainty of the trajectory acquisition system, and based on the case that the uncertain threshold of trajectory is variable in practical applications, the traditional (k, δ)-anonymous model was...

chapter

An effective RSA scheme under the consideration of diffserv QoS in multi-domain heterogeneous software defined optical network

Fengyun Li, Dou Zheng, Jinhua Hu, Danping Ren, more

2016 15th International Conference on Optical Communications and Networks (ICOCN) > 1 - 3

2016 15th International Conference on Optical Communications and Networks (ICOCN)

In this paper, for the purpose of supporting an end-to-end business process with guaranteeing the quality of transmission (QoT) of signal in multi-domain heterogeneous software defined optical networks, we emphatically design routing and spectrum assignment (RSA) algorithm to establish optical paths and allocate spectrum resources. The simulation results verified that compared with distributed scheme,...

article

Microchip electrophoresis with background electrolyte containing polyacrylic acid and high content organic solvent in cyclic olefin copolymer microchips for easily adsorbed dyes

Xuan Wei, Ping Sun, Shenghong Yang, Lei Zhao, more

Journal of Chromatography A > 2016 > 1457 > C > 144-150

Plastic microchips can significantly reduce the fabrication cost but the adsorption of some analytes limits their application. In this work, background electrolyte containing ionic polymer and high content of organic solvent was adopted to eliminate the analyte adsorption and achieve highly efficient separation in microchip electrophoresis. Two dyes, rhodamine 6G (Rh6G) and rhodamine B (RhB) were...

article

An intelligent inter-domain routing scheme under the consideration of diffserv QoS and energy saving in multi-domain software-defined flexible optical networks

Jijun Zhao, Fengyun Li, Danping Ren, Jinhua Hu, more

Optics Communications > 2016 > 366 > C > 229-240

Large scale multi-domain software-defined optical networks (SDON) provisioning has become a key area with increased scalable bandwidth services across wider network regions. Although distributed schemes could achieve lightpath routing by the ergodic process of domain boundary nodes, it increases the complexity of the signaling procedure and deployment of the interface. Moreover, the physical impairments...

article

Design, Synthesis, and Biological Screening of Novel Anthranilic Diamides

Xuewen Hua, Wutao Mao, Zhijin Fan, Xiaotian Ji, more

Journal of Heterocyclic Chemistry > 53 > 3 > 865 - 875

Three series of new anthranilic diamide derivatives containing sulfide, N‐cyanomethylsulfilimine, and N‐cyanomethylsulfoximine groups were designed and synthesized by combining the active substructures of anthranilic diamides and sulfoxaflor. The structures of all newly synthesized compounds were confirmed by IR and ¹H/¹³C‐NMR, and some of them were confirmed by elemental analysis or HRMS too. The...

article

AuNPs colorimetric sensor for detecting platelet-derived growth factor-BB based on isothermal target-triggering strand displacement amplification

Huige Zhang, Fengyun Li, Hongli Chen, Yanhua Ma, more

Sensors and Actuators B: Chemical > 2015 > 207 > PA > 748-755

We developed a colorimetric sensor based on gold nanoparticle (AuNP) labels and target-triggered strand displacement amplification (SDA) for the detection of platelet-derived growth factor-BB (PDGF-BB). Upon the target binding, the linear probe conformation was converted into a triple-helix conformation and then a large number of reporter oligonucleotides were produced by SDA. PDGF-BB was then determined...

article

Synthesis and biological activities of novel 1,2,4-triazole derivatives containing 1,2,3-thiadiazole ring

Yuedong Li, Wutao Mao, Zhijin Fan, Juanjuan Li, more

Chemical Research in Chinese Universities > 2014 > 30 > 3 > 390-395

A series of novel 1,2,4-triazole derivatives containing 1,2,3-thiadiazole ring was designed and synthesized. Their structures were confirmed by IR, 1H NMR, high resolution mass spectrometer(HRMS) and electrospray ionization-mass spectrometer(ESI-MS) combined with melting points and elemental analysis. Preliminary bioassays indicate that these compounds exhibit good insecticidal activity against Aphis laburni...

article

Use of hGluc/tdTomato pair for sensitive BRET sensing of protease with high solution media tolerance

Fengyun Li, Junping Yu, Zhiping Zhang, Zongqiang Cui, more

Talanta > 2013 > 109 > Complete > 141-146

Due to the complicated media, monitoring proteases in real physiological environments is still a big challenge. Bioluminescence resonance energy transfer (BRET) is one of the promising techniques but its application is limited by the susceptibility to buffer composition, which might cause serious errors for the assay. Herein we report a novel combination of BRET pair with humanized Gaussia luciferase...

article

Buffer enhanced bioluminescence resonance energy transfer sensor based on Gaussia luciferase for in vitro detection of protease

Fengyun Li, Junping Yu, Zhiping Zhang, Zongqiang Cui, more

Analytica Chimica Acta > 2012 > 724 > Complete > 104-110

Bioluminescence resonance energy transfer (BRET) has gained favors in recent years as a detection technology for protease activity due to its extreme reliability, high sensitivity and low intrinsic backgrounds. Because of the sensitivity of the donors, substrates and the acceptors, it is expected that BRET systems are sensitive to buffer environments. However, no systematic study has been reported...

article

Catalytic Selective Oxidation of 4-Chlorotoluene by Bi-MCM-41

Junli ZHAO, Guang QIAN, Fengyun LI, Jie ZHU, more

Chinese Journal of Catalysis > 2012 > 33 > 4-6 > 771-776

A series of bismuth incorporated MCM-41 mesoporous samples were synthesized and characterized by inductive coupled plasma emission spectrometer (ICP), X-ray diffraction, N ₂ adsorption/desorption, transmission electron microscopy, and UV-Vis spectroscopy. These samples catalyzed the selective oxidation of 4-chlorotoluene efficiently even on a large scale with H ₂ O ₂ as oxidant...

chapter

A Trust Management Model to Enhance Security of Cloud Computing Environments

XIaodong Sun, Guiran Chang, Fengyun Li

2011 Second International Conference on Networking and Distributed Computing > 244 - 248

2011 Second International Conference on Networking and Distributed Computing (ICNDC)

With the proliferation of cloud computing, the way of reasonable establishment of trust relationship among entities, as a vital part for forming security mechanism in cloud computing environments, is attracting increasing attention. This article introduces a trust management model based on fuzzy set theory and named TMFC including direct trust measurement and computing, connecting, and trust chain...

chapter

A Novel Cooperation Mechanism to Enforce Security in Wireless Sensor Networks

Fengyun Li, Guiran Chang, Fuxiang Gao, Lan Yao

2011 Fifth International Conference on Genetic and Evolutionary Computing > 341 - 344

2011 Fifth International Conference on Genetic and Evolutionary Computing (ICGEC)

In wireless sensor networks, how to detect the malicious nodes and prevent them from attacking the normal nodes has become one of the most important issues. This paper introduces a new mechanism in which the sensor nodes collaborate with each other to resist denial of service (DoS) attack and protect the being attacked nodes. A reputation-based incentive model for cooperation is also proposed. Simulation...

chapter

A Load Balanced Routing Protocol Based on Ant Colony Algorithm for Wireless Mesh Networks

Chunxiao Liu, Guiran Chang, Jie Jia, Lizhong Jin, more

2011 Fifth International Conference on Genetic and Evolutionary Computing > 295 - 298

2011 Fifth International Conference on Genetic and Evolutionary Computing (ICGEC)

Routing algorithm as a research core in the wireless mesh network, the design is good or bad is very important to network performance. In the field of ant colony optimization (ACO), models of collective intelligence of ants are transformed into useful optimization techniques that find applications in computer networking. Unbalanced traffic may lead to more delay, packet dropping, and decreasing packet...

chapter

A Novel Secure Architecture for the Internet of Things

Dong Chen, Guiran Chang, Lizhong Jin, Xiaodong Ren, more

2011 Fifth International Conference on Genetic and Evolutionary Computing > 311 - 314

2011 Fifth International Conference on Genetic and Evolutionary Computing (ICGEC)

With the development of the IoT, different wireless communication technologies and edge network infrastructures are continuously integrated. Therefore, the corresponding communication network environment has become more complex and the security issues involved in the IoT are more complex than any existing network infrastructures. The trust relationship between the heterogeneous entities, security...

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INFONA - science communication portal

Search results for: Fengyun Li

Capital gain overhang and risk–return trade‐off: An international study

DNA Hydrogels and Microgels for Biosensing and Biomedical Applications

Experimental Study on Dynamic Water Grouting of Modified Water-Soluble Polyurethane

Mobile phone mediated point-of-care testing of HIV p24 antigen through plastic micro-pit array chips

Multifunctional Poly‐N‐Isopropylacrylamide/DNAzyme Microgels as Highly Efficient and Recyclable Catalysts for Biosensing

Analysis on Tort Liability of Internet Service Providers

Space Disturbing Based Uncertainty Trajectory Anonymous Algorithm in Trajectory Databases Publication

An effective RSA scheme under the consideration of diffserv QoS in multi-domain heterogeneous software defined optical network

Microchip electrophoresis with background electrolyte containing polyacrylic acid and high content organic solvent in cyclic olefin copolymer microchips for easily adsorbed dyes

An intelligent inter-domain routing scheme under the consideration of diffserv QoS and energy saving in multi-domain software-defined flexible optical networks

Design, Synthesis, and Biological Screening of Novel Anthranilic Diamides

AuNPs colorimetric sensor for detecting platelet-derived growth factor-BB based on isothermal target-triggering strand displacement amplification

Synthesis and biological activities of novel 1,2,4-triazole derivatives containing 1,2,3-thiadiazole ring

Use of hGluc/tdTomato pair for sensitive BRET sensing of protease with high solution media tolerance

Buffer enhanced bioluminescence resonance energy transfer sensor based on Gaussia luciferase for in vitro detection of protease

Catalytic Selective Oxidation of 4-Chlorotoluene by Bi-MCM-41

A Trust Management Model to Enhance Security of Cloud Computing Environments

A Novel Cooperation Mechanism to Enforce Security in Wireless Sensor Networks

A Load Balanced Routing Protocol Based on Ant Colony Algorithm for Wireless Mesh Networks

A Novel Secure Architecture for the Internet of Things

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